Hit-run driver caught speeding days before fatally striking nurse

The driver who admitted to causing the death of a nurse when his car struck her vehicle in Melbourne had been caught speeding in the days before the fatal crash.

Sebastian Kennett, 20, appeared in Melbourne Magistrates Court today where he pleaded guilty to culpable driving causing death and other charges over a crash that killed Lynda Hansen in October.

Ms Hansen died after her car was struck by a stolen Lexus being driven by Kennett, who was allegedly driving at 161km/h seconds before the crash and at 131km/h on impact.

Sebastian Kennett has pleaded guilty to causing the death of nurse Lynda Hansen last year. (Supplied) ()The victim's crushed car being towed from the scene last October. (9NEWS) (9news)

Some witnesses told police at the scene they felt their own car shake as the Lexus drove past them.

Court documents suggest Kennett stole the car from a home in Elwood sometime between September 28 and October 8.

In that period, traffic cameras caught the Lexus speeding and running red lights - on October 3 in Mount Waverley, twice on October 4 in Chadstone, October 5 in Doveton and in Oakleigh East, October 6 in Glen Iris and on October 7 in Chadstone and Oakleigh East.

Two days later, he killed Ms Hansen, sparking a manhunt lasting three days until his arrest on October 12.